.layout-container {
  width: 800px;
  height: 600px;
  margin: 100px auto;
}

.left {
  width: 200px;
  height: 600px;
  float: left;
  border: 1px solid purple;
}

.right {
  width: 500px;
  height: 600px;
  float: right;
  border: 1px solid green;
}
